Miscompilation of `i8x16.select` with the same inputs on x86\_64

🗓️ 03 Mar 2023 12:00:00Reported by rustsecType

Miscompilation of i8x16.select with identical inputs on x86_64 in Wasmtime advisory.

Reporter	Title	Published	Views	Family All 25
CBLMariner	CVE-2023-27477 affecting package rust for versions less than 1.68.2-2	25 May 202309:38	–	cbl_mariner
Chainguard	CVE-2023-27477 vulnerabilities	8 Mar 202321:15	–	cgr
Circl	CVE-2023-27477	9 Mar 202300:23	–	circl
CNNVD	Wasmtime 安全漏洞	8 Mar 202300:00	–	cnnvd
CVE	CVE-2023-27477	8 Mar 202300:00	–	cve
Cvelist	CVE-2023-27477	8 Mar 202300:00	–	cvelist
Debian CVE	CVE-2023-27477	8 Mar 202300:00	–	debiancve
EUVD	EUVD-2023-1143	3 Oct 202520:07	–	euvd
Github Security Blog	wasmtime vulnerable to miscompilation of `i8x16.select` with the same inputs on x86_64	9 Mar 202300:09	–	github
Microsoft CVE	wasmtime is a fast and secure runtime for WebAssembly. Wasmtime's code generation backend Cranelift has a bug on x86_64 platforms for the WebAssembly `i8x16.select` instruction which will produce the wrong results when the same operand is provided to the instruction and some of the selected indices are greater than 16. There is an off-by-one error in the calculation of the mask to the `pshufb` instruction which causes incorrect results to be returned if lanes are selected from the second vector. This codegen bug has been fixed in Wasmtiem 6.0.1 5.0.1 and 4.0.1. Users are recommended to upgrade to these updated versions. If upgrading is not an option for you at this time you can avoid this miscompilation by disabling the Wasm simd proposal. Additionally the bug is only present on x86_64 hosts. Other platforms such as AArch64 and s390x are not affected.	3 Apr 202307:00	–	mscve